60/100IFR Score
Ranked #1 because of its Google rating and review volume: 4.9★ from 656 Google reviews, the most in O'Fallon.
Based on 8 of 9 factors; recency not yet collected.
Best IT Consultants in O'Fallon, MO (2026)
116 IT consultants ranked by IFR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in O'Fallon: Power Up Computers, IFR Score 60/100; 4.9★ from 656 Google reviews; open Saturdays until 2 PM.
- 10
Most-reviewed: Pearl Solutions Group, 183 Google reviews at 5.0★, the most of 116 ranked after Power Up Computers; ranked #10.
Rankings can't be bought. IT providers can't pay to change their rank or score. How we rank
116 O'Fallon IT consultants are ranked here by IFR Score, from nine published factors. 29 open Saturdays and 19 open Sundays, based on posted hours. The median Google rating is 4.9★ across 116 rated IT firms.
Top 10 IT consultants in O'Fallon at a glance
Ranked by IFR Score from public data. Sponsored placements are labelled and never change the order.
| Rank | Business | IFR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Power Up Computers | 60 | 4.9★ (656) | O'Fallon | Sat | Overall |
| 2 | JJMicro Managed IT Solutions | 60 | 5.0★ (54) | Lake Saint Louis, 5 mi away | — | — |
| 3 | Bluebird IT LLC | 57 | 5.0★ (13) | Bridgeton, 23 mi away | — | — |
| 4 | Onsite Computer Consulting - Computer Paramedic | 57 | 4.9★ (111) | Wentzville, 8 mi away | — | — |
| 5 | Geeky Girls Computer Solutions LLC | 56 | 5.0★ (36) | O'Fallon | Sat · Sun · Evenings | — |
| 6 | HanuHigh Technologies Inc | 56 | 4.9★ (14) | Chesterfield, 11 mi away | — | — |
| 7 | Karpel Solutions | 56 | 5.0★ (11) | St. Louis, 25 mi away | Sat · Evenings | — |
| 8 | Ardent IT Solutions, LLC | 56 | 5.0★ (11) | Saint Charles, 10 mi away | — | — |
| 9 | GadellNet Consulting Services | 55 | 4.9★ (174) | St. Louis, 27 mi away | Sat · Sun | — |
| 10 | Pearl Solutions Group | 55 | 5.0★ (183) | Saint Charles, 7 mi away | — | Most reviews |
The 116 best IT consultants in O'Fallon, ranked
Ordered by IFR Score, a 0–100 score from nine published factors. Paid placement never changes the order.
Ranked by IFR Score from public data. Sponsored placements are labelled and never change the order.
Based in Lake Saint Louis, 5 mi away
60/100IFR ScoreRanked #2 because of its Google rating and service focus: 5.0★ from 54 Google reviews, listed on Google as “Computer consultant”.
Based on 8 of 9 factors; recency not yet collected.
Based in Bridgeton, 23 mi away
57/100IFR ScoreRanked #3 because of its Google rating and service focus: 5.0★ from 13 Google reviews, listed on Google as “Computer consultant”.
Based on 7 of 9 factors; recency and availability not yet collected.
Based in Wentzville, 8 mi away
57/100IFR ScoreRanked #4 because of its Google rating and review volume: 4.9★ from 111 Google reviews.
Based on 8 of 9 factors; recency not yet collected.
Based in O'Fallon
56/100IFR ScoreRanked #5 because of its Google rating and review volume: 5.0★ from 36 Google reviews.
Based on 8 of 9 factors; recency not yet collected.
Based in Chesterfield, 11 mi away
56/100IFR ScoreRanked #6 because of its Google rating and service focus: 4.9★ from 14 Google reviews, listed on Google as “Computer consultant”.
Based on 8 of 9 factors; recency not yet collected.
Based in St. Louis, 25 mi away
56/100IFR ScoreRanked #7 because of its Google rating and service focus: 5.0★ from 11 Google reviews, listed on Google as “Computer consultant”.
Based on 8 of 9 factors; recency not yet collected.
Based in Saint Charles, 10 mi away
56/100IFR ScoreRanked #8 because of its Google rating and service focus: 5.0★ from 11 Google reviews, listed on Google as “Computer consultant”.
Based on 8 of 9 factors; recency not yet collected.
Based in St. Louis, 27 mi away
55/100IFR ScoreRanked #9 because of its Google rating and review volume: 4.9★ from 174 Google reviews.
Based on 8 of 9 factors; recency not yet collected.
Based in Saint Charles, 7 mi away
55/100IFR ScoreRanked #10 because of its Google rating and review volume: 5.0★ from 183 Google reviews.
Based on 8 of 9 factors; recency not yet collected.
Based in Creve Coeur, 19 mi away
55/100IFR ScoreRanked #11 because of its Google rating and service focus: 4.0★ from 8 Google reviews, listed on Google as “Computer consultant”.
Based on 7 of 9 factors; recency and availability not yet collected.
Based in Washington, 25 mi away
55/100IFR ScoreRanked #12 because of its Google rating and review volume: 4.9★ from 78 Google reviews.
Based on 8 of 9 factors; recency not yet collected.
Based in Chesterfield, 9 mi away
55/100IFR ScoreRanked #13 because of its Google rating and review volume: 5.0★ from 60 Google reviews.
Based on 8 of 9 factors; recency not yet collected.
Based in Creve Coeur, 17 mi away
55/100IFR ScoreRanked #14 because of its Google rating and service focus: 4.0★ from 6 Google reviews, listed on Google as “Computer consultant”.
Based on 7 of 9 factors; recency and availability not yet collected.
#15 InterVision
Based in Chesterfield, 13 mi away
54/100IFR ScoreRanked #15 because of its Google rating and service focus: 3.8★ from 14 Google reviews, listed on Google as “Computer consultant”.
Based on 8 of 9 factors; recency not yet collected.
Based in Chesterfield, 13 mi away
54/100IFR ScoreRanked #16 because of its Google rating and service focus: 3.6★ from 17 Google reviews, listed on Google as “Computer consultant”.
Based on 8 of 9 factors; recency not yet collected.
Based in Clayton, 23 mi away
54/100IFR ScoreRanked #17 because of its Google rating and service focus: 5.0★ from 12 Google reviews, listed on Google as “Computer support and services”.
Based on 8 of 9 factors; recency not yet collected.
#18 Sloan Innovation
Based in Edwardsville, 40 mi away
54/100IFR ScoreRanked #18 because of its Google rating and service focus: 5.0★ from 3 Google reviews, listed on Google as “Computer consultant”.
Based on 8 of 9 factors; recency not yet collected.
Based in St. Louis, 20 mi away
54/100IFR ScoreRanked #19 because of its Google rating and review volume: 4.8★ from 43 Google reviews.
Based on 8 of 9 factors; recency not yet collected.
Based in St. Louis, 17 mi away
54/100IFR ScoreRanked #20 because of its Google rating and service focus: 5.0★ from 7 Google reviews, listed on Google as “Computer consultant”.
Based on 8 of 9 factors; recency not yet collected.
Based in St. Louis, 19 mi away
54/100IFR ScoreRanked #21 because of its Google rating and review volume: 5.0★ from 32 Google reviews.
Based on 8 of 9 factors; recency not yet collected.
Based in St. Louis, 19 mi away
54/100IFR ScoreRanked #22 because of its Google rating and service focus: 3.8★ from 13 Google reviews, listed on Google as “Computer consultant”.
Based on 8 of 9 factors; recency not yet collected.
Based in University City, 24 mi away
54/100IFR ScoreRanked #23 because of its Google rating and service focus: 5.0★ from 4 Google reviews, listed on Google as “Computer consultant”.
Based on 7 of 9 factors; recency and availability not yet collected.
Based in Eureka, 22 mi away
53/100IFR ScoreRanked #24 because of its Google rating and service focus: 5.0★ from 7 Google reviews, listed on Google as “Computer consultant”.
Based on 8 of 9 factors; recency not yet collected.
Based in St. Louis, 16 mi away
53/100IFR ScoreRanked #25 because of its Google rating and service focus: 2.3★ from 3 Google reviews, listed on Google as “Computer consultant”.
Based on 7 of 9 factors; recency and availability not yet collected.
IT consultants ranked #26 to #50
#1 to #25 are shown in full above. Here are #26 to #50, in IFR Score order; each links to its profile. We publish the top 50 of 116 ranked IT consultants here; the rest are on their profiles.
Also serving O'Fallon
20 more IT consultants within 50 mi that we can't rank yet: too few reviews, or a service we couldn't confirm. Listed A to Z.
| Business | Google rating | Distance |
|---|---|---|
| ABM Federal | 3.0★ (2) | 11 mi |
| All Business Computer Services LLC | 3.0★ (1) | 6 mi |
| BMA Inc | 5.0★ (2) | 25 mi |
| Bundy & Associates Inc | 2.5★ (2) | 12 mi |
| Enterprise Consulting Group | 5.0★ (1) | 16 mi |
| FOS Computer Services | 1.0★ (2) | In O'Fallon |
| Fusion Technology Solutions | 4.5★ (2) | 15 mi |
| JIL TECHNOLOGY | 5.0★ (1) | 16 mi |
| Micrologic Business Systems | 4.5★ (2) | 10 mi |
| MTM Technologies Inc | 5.0★ (1) | 11 mi |
| Nals Comp Doc | 5.0★ (1) | 17 mi |
| Paragon Computers and Repair | 5.0★ (3) | In O'Fallon |
| Platinum Systems | 5.0★ (1) | In O'Fallon |
| Stockell Consulting | 5.0★ (2) | 14 mi |
| StrategiCom Inc. | 5.0★ (1) | In O'Fallon |
| Stratosphere Networks | 5.0★ (1) | 11 mi |
| TEK Consulting LLC | 5.0★ (1) | In O'Fallon |
| Tek4 | 5.0★ (2) | 24 mi |
| ThinkIT STL | 5.0★ (2) | 27 mi |
| Winning Technologies | 4.4★ (29) | In O'Fallon |
How we ranked O'Fallon IT consultants
We scored 116 O'Fallon IT consultants on nine factors, weighted as shown. An IT firm is ranked when its service is confirmed and it has 3 or more Google reviews or a claimed profile. An IT firm with no Google reviews scores zero on rating, review volume and recency. Other unknown factors are left out, not counted as zero. Scores last refreshed November 9, 2026.
Paid placement never changes a rank or score. Sponsored businesses are paid, labelled, limited to 3 and shown above the ranking, outside it.
| Factor | Weight | Computed from | In O'Fallon data |
|---|---|---|---|
| Reputation | 25% | Google star rating, adjusted for how many reviews back it | Measured |
| Review volume | 15% | Number of Google reviews, compared with the most-reviewed IT firm on the list | Measured |
| Recency | 10% | Share of reviews from the last 12 months | Not yet collected |
| Availability | 5% | Weekly open hours, Saturday, Sunday and 24/7 support | Measured |
| Service focus | 15% | How clearly the firm does this service (its Google category and name) | Measured |
| Proximity | 5% | Based in the city scores highest, less the farther away it is | Measured |
| Claimed profile | 10% | The firm has claimed its IT Firms Ranked profile (free or paid earn the same) | Measured |
| Partnered | 5% | The firm links to IT Firms Ranked from its own website with our badge, checked periodically | Measured |
| Client reviews | 10% | Verified client reviews collected by IT Firms Ranked: their rating and how many there are | Measured |
How to choose an IT consultant
- Ask whether the consultant earns commissions or referral fees on products they recommend.
- Check experience with projects like yours, and ask for a sample deliverable.
- Agree the deliverables, timeline and price for each phase before work starts.
- Ask for two or three references from clients of your size and industry, and call them.
- Get the scope, response times and price in writing before you sign, including how you leave and get your data back.
Questions to ask an IT consultant
- Do you receive commissions from any vendor you might recommend?
- What will we receive at the end of the project?
- Who will do the work, and what similar projects have they completed?
- Do you bill hourly, per project or on retainer?
- Will you work alongside our current IT provider?
Terms explained
- MSP (managed service provider)
- A firm that runs a business’s IT for a recurring fee: monitoring, patching, help desk, backups and security tools.
- Co-managed IT
- An arrangement where an outside firm supports an in-house IT person or team, sharing tools and tasks.
- Break-fix
- IT support paid per incident or per hour, with no monthly agreement.
- SLA (service-level agreement)
- The contract terms for response and resolution times, uptime and support hours.
- Help desk
- The support line staff call or email for IT problems.
- RMM
- Remote monitoring and management software that lets an IT firm watch, patch and fix computers remotely.
- vCIO
- A virtual chief information officer: part-time IT strategy and budgeting from an outside firm.
- MSSP
- A managed security service provider: a firm that monitors and manages security tools around the clock.
- EDR / MDR
- Endpoint detection and response software, and the managed service of people watching its alerts (managed detection and response).
- MFA
- Multi-factor authentication: a second proof of identity, such as an app prompt, on top of a password.
- Penetration test
- An authorised, simulated attack on your systems to find weaknesses before criminals do.
- SOC 2
- An independent auditor’s report (AICPA standard) on a service provider’s security controls.
IT consultants in O'Fallon: frequently asked questions
Who is the best IT consultant in O'Fallon?
By IFR Score, the highest-ranked IT consultant in O'Fallon, MO is Power Up Computers with an IFR Score of 60/100. It has 4.9★ from 656 Google reviews. It is open Saturdays until 2 PM. JJMicro Managed IT Solutions (#2) and Bluebird IT LLC (#3) follow. We ranked 116 IT consultants on nine factors, last updated November 9, 2026.
How many IT consultants are there in O'Fallon?
ITFirmsRanked ranks 116 IT consultants serving O'Fallon, MO. 4 of them are based in O'Fallon; the rest serve it from nearby towns. Another 20 within 50 mi are listed but not ranked yet. Counts are as of November 2026.
Which IT consultants in O'Fallon work on weekends?
29 of 116 ranked IT consultants post Saturday hours and 19 post Sunday hours. The highest-ranked open Saturdays are Power Up Computers (#1), Geeky Girls Computer Solutions LLC (#5) and Karpel Solutions (#7). Posted hours are office hours; many firms also run an after-hours support line for contract clients.
What Google rating do O'Fallon IT consultants have?
The median Google rating among 116 rated IT consultants in O'Fallon is 4.9★, with a median of 11 reviews. Power Up Computers has the most, 656 reviews, and ranks #1. We adjust ratings for review count, so a few five-star reviews cannot top the list.
How does ITFirmsRanked rank IT consultants?
Each IT consultant gets a 0–100 IFR Score from nine published factors, led by reputation (25%), review volume (15%), service focus (15%) and recency (10%). An IT firm with no Google reviews scores zero on rating, review volume and recency; other factors we cannot measure are left out. Only IT firms with a confirmed service and 3 or more reviews, or a claimed profile, are ranked.
Do IT consultants outside O'Fallon count in this ranking?
Yes, if they are within 50 mi of the O'Fallon city center, our service radius for IT consultants. Each listing shows where the IT firm is based and how far away it is. Proximity is 5% of the IFR Score, so a nearby IT firm gets a small edge.
Can IT consultants pay to rank higher on ITFirmsRanked?
No. The IFR Score never reads payment status, and this ranking has 0 paid placements. Up to 3 Featured IT firms may appear above the list, labelled Sponsored and showing their honest rank.
What does an IT consultant do?
IT consultants advise on technology plans and projects: system selection, cloud migrations, budgets, security and compliance programmes, often as a part-time or virtual CIO.
How are it consultants in O'Fallon ranked?
By IFR Score: Google rating and review volume, recent reviews, opening hours, how clearly the firm does IT consulting, distance, a claimed profile, our badge and verified client reviews. Sponsored placements never change the order.
When does a business need an IT consultant rather than an IT provider?
For decisions and projects rather than day-to-day support: choosing a new system, planning a cloud move, setting an IT budget, preparing for an audit or reviewing an existing IT provider.
How do IT consultants charge?
By the hour, by the project or on a monthly retainer for ongoing virtual CIO work. Ask for a fixed price or a capped estimate on defined projects.
Update log for O'Fallon
- November 2026: IFR Scores recalculated for 116 IT consultants serving O'Fallon.
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